Automatic pump for motor-vehicles.



W. DEWEY.

AUTOMATIC PUMP FOR MOTOR VEHICLES.

APPucATxoN FILED MAH.13.1917.

1,287,912. Patented De... 1T, 1918.

2 SHEETS-SHEET l.

w. DEWEY'.

AUTOMATIC PUMP FORv MOTOR VEHICLES.

APPLICATION FILED MAR. I3. 19|?.

Patented Dee. l?, 1918.

2 SHEETS- SHEET 2 BELLAIRE, MICHIGAN.

UTEATIC PUMP FOR TiOTDR-VEHICLES.

application ined March 1.3.1917'.

1i'. linoivn that l, TALTEP. Dmvn, a en of *.he. United Sintes of n'ieriea, rennfg ai Bellaire; in the eounly of ,/ntrim il State of li/iehigan, have invented cernew and une lnl improvements in )intonatie Pumps 'for s'oor-Vehicles; and A (lo hereby declare he following ro be a full7 clear, und exact description of the invention,

oel :incl having for its primary gnrpose che provision of niecha- 'eh becomes automatically operable Y. nre in ihn tire has redncefl frain preilererinineil amount and omeS anicmaticallj. inoperative sure in the e has reached a iig ier prei'lcliermineil amonnl..

The mechanism by which thin result is an ''aineil iss illnslraerl in the accompanying ings in which:

Sisgnre l is a cideeievalion of the same.

l :i vertical sec'rion'l "ethronglr i Section taken Substantially on i: of F an enlarged seeion taken diaphragm mechanism of the plan view, f3 a aille elevais a verieal section ol a (leor. Srnctnre thi nigh which he aniooperation of.' the ineehanism is nr.-

a plan view, Fig. a. Side eleva- Fin. l. a fragmenary nnfler plan :he movable gear :incl clnich elef h is aniomatieally rendered oper* inoperative with the reduction e pressure. plan View and l l2 isa line 12-l2 of Fig. ll, illuse element 'for operair Us. SS. Q and l0, and

ionall plan 'reiken on i3 on Fig. li.

e reference characters reifer io like honi` 'the Several 'Vieiv op? the Specicaon of Letters Patent.

yaon'teri Doc. 1^?, MMS.

ner. Attached to said wheel is a Shallow dishmember having a anil Sides 3"* in g lilce onse i the open Siile rhereof being normally covererl by a plaie l. Lozateil alongside the base l is a disk havingr a plurality of opening y (i, the llink being permanently and` immovably secured lo the emi olf the axle 7 on which Jche wheel is mounted. Adjacent one edge of the (liSli S n lip 8 is turned late ally as Shown best in Fig. 13.

pump barrel 9 is Secured by means of a braelie, l cast integral therewith Aro the inner Jr'ace of the baSe and a valveless pis:- ion ll mounted Within the barrel said piston being secured at the end ol a rod l2 which at ils opposing enfl is pivolially conneeerl o a curved link 13 which is pivotally mounted al il on Saiil base 3. Bel-Ween its enils link i3 is enlarged :unl has' a curved slor l cnt therein through which a pin 1G :arriod adjacent one elige ol n pinion 17 project i. .il is permanently secured, it being eiprocales the rml l2 and he piston carried thereon. thereby forcing air ont of the barrel. 'The air forced from the barrel is rarrierl away through the Small pipe 1T between which nml lie base. a checl; valve 1S iS l0- catcil lo guard against re'l'urn of the air to the barrel. The air passing; through The pipe l? is; led to a hfmning` eon'inriaecl of impor aml lower members 19 and Q0 bci'ween which a diaphragm 2i. pre'fera ly of rnbber, is placed *bhe air enterinz'gr above the fliaphragin ihrongrh a passage 2:? Yformed in the upper member 1f) as Shown in Fig. 4. The air leaves saiil member i9 lhronfrh a nipple 253 this nipple being' adapted to have a snit able connection belween ii nml the Valve of an automobile Jrire to pane he air thereto.

The flia'ihraffm 2l provides an air tight commotion so lhai; anyv air eniiereil above it. cannot escape oX-cegii ihrongrh 'ihe part`23. The. iiaphragm nnrler pressure. is adapted io more an?. is guided in its movements by a pin 2l which enters into an opening formell in ihe housing member if). (ln the opnosi'e sirle ci: ille diaphragm a pin 25 projeefs h-:fongh hooiher member "20 and seats ,.'i an irregiilai'vv shaped niemberi mounted at one end as enti being free OG,

connect to operate the same with the rotation of the wheel, means for automatically connecting said pumping mechanism to said device when the pressure against which the pump works is below a certain amount and means for automatically disconnecting said pumping mechanism from the device upon attainment of a predetermined higher pressure.

3. in combination with a relatively stationary axle, a wheel having a hub mounted thereon for rotation, a short cylindrical housing mounted on and movable with the wheel, a disk secured to the axle within the housing. a gear loose on the hub, interengaging devices on the gear and disk, av pump mounted within the housing. mechanism interposed between the pump and gear where by the pump isl adapted to be operated on rotation of the wheel when the gear and disk are connected together, means normally tending to force the gear into connection with the disk, movable means adapted in one position to disconnect the gear and disk and occupying said position when the pressure against which the pump works is above certain amount, and means to automatically move said movable means to another position to permit engagement of the gear and disk on decrease of pressure to a certain predetermined amount.

4. In combination with. a relatively stationary axle, a wheel having a hub mounted thereon for rotation, a disk having openings therein fixed on the axle, a gear loose on the hub, a member including a base fixed on the wheel. pins on the gear extending toward the disk, a pinion mounted on the base and meshing with ythe gear, an air pump carried on the base, means for operating the same on rotation of the pinion, and means automatically operated by the variations in pres-v sure against which the pump works for controlling the connection ot the gear and di'sk, said connection occurring when the pressure is below a certain amount and breaking when a certain higher pressure is attained.y

-5. ln combination with a relatively stationary axle. a wheel'having a hub rotatively mounted onv the axle. a disk fixed to the axle, a gear loose on the hub, interengaging means on the gear and disk, a cylindrical housing located around tho huh and attached to move with the. wheel, a pump connected to one side of the housing within the same, mechanism interl'iosed between the gear and pump for operating the pump when the gear is connected with the disk and the wheel rotated. and means automatically operated by the variations ot thc pressure. against which the pump works for controlling the connectiouot the. gear and disk, said connection occurring when the pressure is below a certain amount and breaking when a certain higher pressure is attained.

6. In combination with a relatively stationary axle, a wheel having a hub rotatively mounted on the axle, a disk xed to the axle, a gear loose on the hub, interengaging means on the gear and disk, a pump, mechanism interposed between the gear and pump for operating the pump when. the gear is connected with the disk and the wheel rotated, a yoke secured to and controlling the position of the gear, a lug projecting from the yoke, a rotating cam member on which the lug rests, and means for turning said cam member a partial rotation when the pressure against which the pump works reduces below a certain amount to therebyT prevent the connection of the disk and gear.

7. In combination with a relatively stationary axle, a wheel having a hub rotatively7 mounted on the axle, a disk fixed to the axle, a lip projecting laterally from the edge of the disk, a gear loose on the hub, interengaging means on the gear and disk, a oump,'mechanism internosed between the gear and pump for operating the pump when the-gear. is connected with the disk and the wheel rotated, yoke pivotally mounted and attached to the gear, a rotatively mounted cam member, a lug projecting from the yoke and resting against said cam member, bars extending from and movably mounted on said cam member vand adapted to engage with saidlip on turning the wheel about the disk to rotate the cam member, and means for holding said bars from engaging with the lip when the pressure against which the pump works is'at l.it-predetermined amount, said means becoming ineffective when the pressure reduces below a lower predetermined amount'.

8.*In combination with a relatively stationary axle, a wheel having a hub rotatively mounted on theaxle, a disk fixed on the axle, a lip projecting from an edge of the disk, a cam member rotatively mounted on the wheel adjacent the disk, arms movably mounted on the cam member and extending radially therefrom the end of one of said arms normally engaging with the lip on turning about the disk, a gear loosely Vmounted on the hub, interengagi-ng devices on the gear and disk, a yoke connected to the gear having a part bearing against the cam member whereby in one position thereot' the gear and disk are not connected and in another position they are connected, a pump, mechanism interposed between the gear and pump for operating the pump when said gear and disk are connected and the \\'liee l rotated, a conduit .leading from the pump, a housing having a flexible diaphragm against which the air pressure produced by the punu'vis directed, a pin extending from the diaphragm, a spring having '-an arm at the end of the pin resisting said air pressure and a member pivotally mount- @d and iiii'eiposed b'evfeon Suid spring auf. membei moving out of said position into idle pin having n free @mi aciupe on ui'tziinpuii' of fue oiie mm on ra-uction of the meut 0i" n Cei in pro" and depi'essimi 0 i eiziin iovfe amouns, Subl@ of the diaphragm in be inici' 1 pago-d iii 'die 

